Vocaloid is a software voice synthesizer developed by Yamaha. Since the release of Vocaloid2 and the character vocal set (voice set) “Hatsune Miku” 【初音ミク】, Vocaloid has become immensely popular in Japan. From manga doujins to video games to plastic figurines, Miku and her friends have spread far and wide. As an audio engineer and human-computer-interaction [...]